OpenAI says GPT-6 Sol and Luna build on Astra’s alignment advances
OpenAI says GPT-6 Sol and Luna build on Astra’s advances in alignment and show improvements over their GPT-5.6 counterparts.
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ChatGPT Voice can now use plugins, GPT-6 models, and ChatGPT Work
OpenAI says ChatGPT Voice can use plugins such as email, calendar, and Slack, run on GPT-6 Astra, Sol, and Luna, and work in ChatGPT Work on the web and mobile. The update is rolling out globally today in the latest version of the app.
GPT-6 Sol and Luna roll out in ChatGPT Work, Codex, and the API
On September 22, 2026, Plus, Pro, Business, Enterprise, and Edu users get both models in ChatGPT Work and Codex, and both are available in the API. Free and Go users can try GPT-6 Luna in the desktop app.
OpenAI introduces GPT-6 Sol and GPT-6 Luna at API prices 50% below GPT-5.6 promotional rates
OpenAI says GPT-6 Sol and GPT-6 Luna build on advances behind GPT-6 Astra as faster, more affordable models for work at scale. More efficient caching and inference are reflected in API prices 50% lower than GPT-5.6 promotional pricing.
MentalHealthBench covers everyday support through acute crises
OpenAI says MentalHealthBench is designed for the full range of mental health conversations people bring to AI, from everyday support to more acute crisis scenarios, rather than only emergencies.
OpenAI releases MentalHealthBench for realistic mental health conversations
OpenAI has openly released MentalHealthBench, a new benchmark built with input from more than 80 mental health clinicians. OpenAI says it shows frontier models continuing to improve in realistic mental health conversations.